Can Sand/Dust get in your Macbook scratch the battery, creating shorter battery life/service battery message on your screen?
(mine is a 2012 Macbook Air) I recently went into a store, UNDER WARRENTY, and they checked it out, and said they couldn't replace it under warrenty, therefore i would have to pay $150 to get a new battery. They say they couldn't because it was USER- created. No, how in the world could i have possibly gotten sand in there, they say it was through the ports or something, but i don't go outside with it?! Can they do that?
This error message appeared ONLY when i downloaded Mavericks.
MacBook Air (13-inch Mid 2012), OS X Mavericks (10.9)